# Johann Rahn

> Johann Heinrich Rahn was a Swiss mathematician who is credited with the first use of the division sign, ÷ and the therefore sign, ∴. The symbols were used in Teutsche Algebra, published in 1659. John Pell collaborated with Rahn in this book, which contains an example of the Pell equation. It is uncertain whether Rahn or Pell was responsible for introducing the symbols.

*Mathematician (1622-1676)*

**Canonical URL:** https://fame.am/person/johann-rahn

## Identity
- **Profile type:** Academic ([Wikidata](https://www.wikidata.org/entity/Q39631))
- **Category:** Academics
- **Country:** Switzerland
- **Born:** 1622-03-10
- **Died:** 1676-05-27
- **Status:** deceased
- **Gender:** male

## Bio

Imported from discovery source: wikidata-dump

## Fame
- **Popularity score:** 40.1 / 100
- **Momentum:** 0.0 / 100  (trend: FALLING)
- **Historical depth:** 8.1 / 100
- **Now attention:** 0.0 / 100
- **Source confidence:** 50.0 / 100
- **Profile completeness:** 70.0 / 100

## Sources
- [Йоганн Ран](https://uk.wikipedia.org/wiki/%D0%99%D0%BE%D0%B3%D0%B0%D0%BD%D0%BD_%D0%A0%D0%B0%D0%BD)
- [Johann Heinrich Rahn](https://ca.wikipedia.org/wiki/Johann_Heinrich_Rahn)
- [Johann Heinrich Rahn (Mathematiker)](https://de.wikipedia.org/wiki/Johann_Heinrich_Rahn_(Mathematiker))
- [Johann Heinrich Rahn](https://en.wikipedia.org/wiki/Johann_Heinrich_Rahn)
- [Johann Heinrich Rahn](https://es.wikipedia.org/wiki/Johann_Heinrich_Rahn)
- [Johann Heinrich Rahn](https://fr.wikipedia.org/wiki/Johann_Heinrich_Rahn)
- [Johann Rahn](https://pl.wikipedia.org/wiki/Johann_Rahn)
- [Ран, Иоганн](https://ru.wikipedia.org/wiki/%D0%A0%D0%B0%D0%BD%2C_%D0%98%D0%BE%D0%B3%D0%B0%D0%BD%D0%BD)
- [Иоганн Ран](https://tt.wikipedia.org/wiki/%D0%98%D0%BE%D0%B3%D0%B0%D0%BD%D0%BD_%D0%A0%D0%B0%D0%BD)
- [Wikidata](https://www.wikidata.org/wiki/Q3180572)

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